Chapter 3 ________________________________________________________________ Installation
VAISALA ________________________________________________________________________ 81
Installing Solar Radiation Sensors
NOTE
Preferred orientation for the solar radiation sensors is such that no
shadow is cast on the solar radiation sensors during any time of the
day. In the northern hemisphere, this implies that the solar radiation
sensors should be south of the mast.
QMS101/QMS102
The pyranometer (QMS101 or QMS102) can be installed on a sensor
arm as follows:
1. Attach the pyranometer (2) to the sensor arm (1) using the bolts
(3) provided. For the explanation of the numbers, see Figure 76
below.
2. Lead the cable (4) through the sensor arm (5). Guide the sensor
cable through the sensor arm opening (6).
3. Finally, connect the signal cable to the connector at the lower
base of the tube. For more information, see section Connecting
Cables on page 71.
0201-038
Figure 76 Installing QMS101 or QMS102 Pyranometer
on Sensor Arm
QMN101
It is recommended to install the sensor at least 1.5 meters above the
surface in order to avoid shading effects and to promote spatial
averaging. Install the sensor as follows:
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